Error mitigation techniques are provided for video coding system in which input frames are selected for coding either as a Random Access Pictures or as a non-RAP frame. The URL may include a generalized field having a descriptor that identifies a property of the process control element and that operates so that, when the URL is selected, the generalized field is replaced with the property identified by the descriptor. The playback speed is decreased when an out of sequence packet is detected, thereby tending to increase the jitter buffer length. A signal processing is applied to the added data to reproduce a photographed image. The fluid delivery members are retained in the first and second deployed positions by a retention member. Specifically, the interface configuration between the stem and the adapter, as well as between the adapter and the head are designed such that relative positioning of these components provides a continuous adjustment in the radial offset.